Braking distance and reaction distance of physical vehicle in grade one of senior high school Need a detailed problem-solving process and analysis of the problem ideas [don't be too complicated, people can't understand it] In order to be safe, cars are on the way, between cars Speed response distance braking distance 10 12 20 15 18 x 20 y 80 25 30 125 A certain distance must be kept because it is seen from the driver In the reaction time from a certain situation to braking action, the car There is still a distance to pass, which is called reaction distance From taking the brake action to stopping the car moving through The distance is called braking distance. The table shows the braking distance at different speeds Part of the data of reaction distance and braking distance are calculated according to the analysis The data X and y not given in the table should be

Braking distance and reaction distance of physical vehicle in grade one of senior high school Need a detailed problem-solving process and analysis of the problem ideas [don't be too complicated, people can't understand it] In order to be safe, cars are on the way, between cars Speed response distance braking distance 10 12 20 15 18 x 20 y 80 25 30 125 A certain distance must be kept because it is seen from the driver In the reaction time from a certain situation to braking action, the car There is still a distance to pass, which is called reaction distance From taking the brake action to stopping the car moving through The distance is called braking distance. The table shows the braking distance at different speeds Part of the data of reaction distance and braking distance are calculated according to the analysis The data X and y not given in the table should be

From the first, second and fourth terms, we can see that the reaction time is t = 12 / 10 = 18 / 15 = 30 / 25 = 1.2s, so y = 20 * 1.2 = 24m
From the formula V ^ 2 = 2aX a = V ^ 2 / 2x = 100 / 40 = 2.5
In the second group, x = V ^ 2 / 2A = 15 * 15 * / 2 * 2.5 = 45m
The data not given in the table are x = 45, y = 24

What is the relationship among reaction time, reaction distance and braking distance?

Reaction time is the time from the driver's accident to braking
Reflection distance is the speed at the time of the accident multiplied by the distance traveled by the reflection time vehicle
The braking distance is the distance the car travels after the brake is applied

How far can a car run on a liter of oil? I need a conversion formula!

It's impossible to calculate how far a car can run on fuel because there are traffic lights, traffic jams and air-conditioning on the way. You can only calculate the average fuel consumption per kilometer when your car is filled with a full tank of fuel. For example, when you fill a full tank of fuel, you first record the current kilometer a, then fill it up when you go to the next refueling, and record the current kilometer

On the two mutually vertical horizontal straight roads, a is walking from west to east towards the intersection at the speed of 3m / s, and B is walking northward through the intersection at the speed of 4m / s. at this time, the distance between a and B is 100m______ s. What is the minimum distance between a and B______ m．

Let TS be the nearest distance between them, then a moves to point C, B moves to point D; at this time, a moves eastward X1 = v1t = 3T; B moves northward 4T; then the distance between them is L = (100 − 3T) 2 + (4T) 2 = 25t2 − 600t + 10000; when t = 12s, they meet nearest, then the quadratic function has the minimum, then the minimum